Coolant Supply; Servicing And Commissioning Holding Brakes - Bosch Rexroth MAD Project Planning Manual

MAD / MAF Asynchronous Housing Motors
12.5.4

Coolant supply

12.5.5

Servicing and commissioning holding brakes

Before initial startup
During operation
It may become necessary to disassemble the coolant supply for maintenance
measures or troubleshooting.
● This work may only be carried out by skilled personnel.
● Do not carry out any maintenance measures while the machine is run‐
ning. Comply with the safety instructions.
● Protect open supply lines and connections against ingress of dirt.
Before installing the motor, check the holding brake to ensure it is functioning
properly.
Measure the holding torque of the brake and resurface the holding brake if
necessary.
Procedure:
1. De-energize the motor and ensure it cannot be restarted.
2. Measure the transmittable holding torque of the holding brake using a
torque wrench. The holding torque of the brakes is specified on the data
sheets.
3. Once the holding torque specified on the data sheets is reached, the
holding brake is ready for operation.
If the holding torque specified on the data sheets is not reached,
the holding brake has to be resurfaced as described in step 4.
4. Resurfacing process:
Recommended resurfacing
Interval
Resurfacing speed
Program
Tab. 12-4: Recommended resurfacing of motor holding brakes
Once the holding torque specified on the data sheets is reached, the
holding brake is ready for operation.
If the holding torque specified on the data sheets is not reached, the
holding brake has to be resurfaced as described in step 4.
If the specified holding torque is not reached after the holding brake has
been resurfaced the second time, the holding brake is not operational.
In this case, please contact Bosch Rexroth Service.
If holding brakes are required only sporadically in the operating phase (brak‐
ing cycle > 48 h), film rust may form on the brake surfaces.
To prevent the holding torque from falling below the specified value, we rec‐
ommend proceeding as follows:
Recommended resurfacing
Interval
Resurfacing speed
Number of resurfacing revolutions
Tab. 12-5: Recommended resurfacing of motor holding brakes
Operation of MAD/MAF motors
1x
100 min -1 / duration 30 s
Supplied with 500 ms clock pulses
1x in 48 h
100 min -1
1
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